Book
Circle of Spies (the Culper Ring)
Book 3 in the The Culper Ring series.
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During the final months of the American Civil War, Marietta Hughes discovers that Confederate conspirators have been meeting beneath her home. Drawn into the espionage tradition of her family, she works with Union supporters to identify the Knights of the Golden Circle and prevent further attacks. The investigation also forces her to confront secrets left by her husband and decide where loyalty lies when family and country conflict.